spl: Use CONFIG_SPL... instead of CONFIG_..._SPL_...

We like to put the SPL first so it is clear that it relates to SPL. Rename
various malloc-related options which have crept in, to stick to this
convention.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Reviewed-by: Martyn Welch <martyn.welch@collabora.com>
Reviewed-by: Svyatoslav Ryhel <clamor95@gmail.com>
diff --git a/configs/display5_defconfig b/configs/display5_defconfig
index 481c737..496fd4a 100644
--- a/configs/display5_defconfig
+++ b/configs/display5_defconfig
@@ -38,7 +38,7 @@
 CONFIG_BOOTCOMMAND="if run check_em_pad; then run recovery;else if test ${BOOT_FROM} = FACTORY; then run factory_nfs;else run boot_mmc;fi;fi"
 CONFIG_MISC_INIT_R=y
 CONFIG_SPL_BOOTCOUNT_LIMIT=y
-CONFIG_SYS_SPL_MALLOC=y
+CONFIG_SPL_SYS_MALLOC=y
 # CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_USE_SECTOR is not set
 CONFIG_SPL_DMA=y
 CONFIG_SPL_ENV_SUPPORT=y